Journal ArticleDOI
B-concentration dependence on anisotropy field of CoFeB thin film for gigahertz frequency use
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TLDR
In this article, high moment CoFe thin films (Co/sub 35/Fe/sub 65, Co/sub 25/ Fe/sub 75, Co /sub 15/Fe /sub 85) were obtained using synchronous triple-RF magnetron sputtering to obtain the films with large anisotropy fields greater than 500 Oe.Abstract:
B was added to the high moment CoFe thin films (Co/sub 35/Fe/sub 65/, Co/sub 25/Fe/sub 75/, and Co/sub 15/Fe/sub 85/) using synchronous triple-RF magnetron sputtering to obtain the films with large anisotropy fields greater than 500 Oe. These films required inductor core materials operating at the frequencies of several gigahertz. Magnetic properties and the crystalline structure of the CoFeB films were investigated. It was found that the B addition increased the anisotropy field to 400-700 Oe and that the increase in anisotropy field was associated with changes in the crystalline structure, crystallite sizes, and crystallite orientation. The results indicated that CoFeB films have potential for use in magnetic cores and inductors operating at gigahertz frequencies.read more
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Current-Confined Effect of Magnetic Nano-Current-Channel (NCC) for Magnetic Random Access Memory (MRAM)
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Damping of CoxFe80−xB20 ultrathin films with perpendicular magnetic anisotropy
Thibaut Devolder,Pierre-Henri Ducrot,J.-P. Adam,I. Barisic,N. Vernier,Joo-Von Kim,B. Ockert,Dafiné Ravelosona +7 more
TL;DR: In this paper, the authors used vector network analyzer ferromagnetic resonance to study the perpendicularly magnetized CoFeB films and reported the dependence of the anisotropy, the g-factor, and the damping upon the Fe-Co compositional ratio in amorphous and crystalline states.
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Method for manufacturing non-volatile magnetic memory
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References
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Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Journal ArticleDOI
Grain size dependence of coercivity and permeability in nanocrystalline ferromagnets
TL;DR: In this article, a series of crystallized ribbons of composition Fe/sub 74.5-x/Cu/sub x/Nb/sub 3/Si/sub 13.5/B/sub 9/ (x=0, 1 at) have been annealed between about 500 degrees C and 900 degrees C.
Journal ArticleDOI
Effects of boron contents on magnetic properties of Fe-Co-B thin films
TL;DR: In this paper, the effects of B on the magnetic properties and high frequency characteristics of the Fe/sub 7/Co/sub 3/ based thin films were investigated through the microstructural analysis.
Journal ArticleDOI
Soft magnetism of Fe–Co–N thin films with a Permalloy underlayer
Nian X. Sun,Shan X. Wang +1 more
TL;DR: In this article, an exchange-induced ripple reduction mechanism was proposed to explain the effects of the Permalloy underlayer on the FeCoCoCoN films, which showed significantly improved magnetic softness when a very thin PermAlloy under layer is applied.